TY - JOUR
T1 - Large thermal conductivity due to spins in the Haldane gap system Y2 BaNiO5
AU - Kawamata, T.
AU - Miyajima, Y.
AU - Takahashi, N.
AU - Noji, T.
AU - Koike, Y.
N1 - Funding Information:
This work was supported by a Grant-in-Aid for Scientific Research from the Ministry of Education, Culture, Sports, Science and Technology, Japan. One of the authors (T.K.) was supported by the Japan Society for the Promotion of Science.
PY - 2007/3
Y1 - 2007/3
N2 - We have measured the thermal conductivity along the a-axis parallel to the one-dimensional (1D) spin chain, κa, of the Haldane gap system Y2 BaNiO5. As a result, we have observed thermal conductivity due to spins, κsp, as large as at least 10 W / K m around 100 K corresponding to the magnitude of the Haldane gap. The large κsp may be due to the large bandwidth of spin excitations. Otherwise, it may be attributed to the ballistic thermal conduction due to spins which is theoretically expected in Haldane gap systems with the spin quantum number S = 1.
AB - We have measured the thermal conductivity along the a-axis parallel to the one-dimensional (1D) spin chain, κa, of the Haldane gap system Y2 BaNiO5. As a result, we have observed thermal conductivity due to spins, κsp, as large as at least 10 W / K m around 100 K corresponding to the magnitude of the Haldane gap. The large κsp may be due to the large bandwidth of spin excitations. Otherwise, it may be attributed to the ballistic thermal conduction due to spins which is theoretically expected in Haldane gap systems with the spin quantum number S = 1.
KW - Haldane gap
KW - Low-dimensional spin system
KW - Thermal conductivity
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U2 - 10.1016/j.jmmm.2006.10.326
DO - 10.1016/j.jmmm.2006.10.326
M3 - Article
AN - SCOPUS:33847336557
VL - 310
SP - 1212
EP - 1214
JO - Journal of Magnetism and Magnetic Materials
JF - Journal of Magnetism and Magnetic Materials
SN - 0304-8853
IS - 2 SUPPL. PART 2
ER -